【单选题】【消耗次数：1】
23. Anna was reading a piece of science fiction, completely ____ to the outside world.
①
being
②
having lost
③
losing
④
lost
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相关题目
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Anna was reading a piece of science fiction, completely _____ to the outside world.
①
having been lost
②
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【单选题】
Sam, having forgotten to save his work [] lost all of his revisions when his computer crashed.
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The New Testament
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The Old Testament
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They are working hard to____ what they have lost.
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make out for
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①
A．由蹄表皮(蹄匣)和蹄真皮(肉蹄)构成
②
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They made a _____ search for the lost ring, but didn’t find it.
①
though
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although
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thorough
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